Printer&#39;s chase.



P. A. ROGERS.

PRINTER'S CHASE.

APPLICATION FILED JULY a, 1915.

Patented Jan. 11, 1916.

a SHEETS-SHEET l.

COLUMBIA PLANOGRAPH go, WASHINGTON, D c.

P. A. ROGERS.

PRINTERS CHASE.

APPLICATION FILED JULY 9, 1915.

Patented J an. 11, 1916.

3 SHEETS-SHEET 2.

// W//// u l v P. A. ROGERS.

PRINTER'S CHASE.

APPLICATION FlLED JULY 8, 1915.

1,168,034, I P11611111 Jan.11, 1916.

3 SHEETS-SHEET 3- ..-UN1TEDSTATES P T N OFFICE-I PLUMLEIGH A. :aoenns, 0F Mi v vEAroLIs, MmNEsorA.

rnm'rnns CHASE.

enable others skilled in the art to which it appertains to make and use the same.

This invention relates-to printers chases or similar holders for securing printing plates and other printing devices in printing presses; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawings, Figure 1 is a front view of a printers chase constructed according to this invention. Fig. 2 is a side view of a portion of the bottom edge of the chase, showing some of the slides. Fig.3 is a side view of a portion of one side edge of the chase. showing the releasing levers. Fig. 4 and Fig. 5 are sections through the chase and its slides, taken on the lines az-w and y-y respectively in Fig. 1. Fig. 6 is a front view, partially in section, of a portion of the chase, showing the pawls. Fig. 7 is a front view of a chase showing jaw plates for holding small printing plates. Fig. 8 is a detail front view of one jaw plate. The main portion of the chase consists of a plate 2 provided with beveled projections 3 at its top and bottom edges for convenience in clamping it to the printing press. This plate has dovetailed guide grooves 4 arranged parallel to each other and open at its front face. Two series of slides 5 and 6 are arranged in these guide grooves. The slides 5 and 6 are arranged alternately of each other, and they have dovetailed projections 7 and 8 respectively at their opposite ends which form clamping jaws for engaging with a printing plate 9 or other printing appliance of any approved sort.

The jaws of one series of slides engage with one edge of a printing plate, and the jaws of the other series of slides form an abutment which bears against the opposite edge of the plate. The slides 5 have ratchet teeth 11 on their backs, and the slides 6 have ratchet teeth 12, arranged in the reverse direction from the teeth 11. The slides 5 are provided with retaining pawls 14 which engage with their teeth 11. These Specification of Letters Patent.

Application filed July 8, 1915. Serial No. 38,676.

Patented Jan. 11,1916.

pawls 14 project from a rock-shaft 15 which 1* is journaled in suitable bearings in the plate. A slot 16 is preferably cut in the plate, and the portions of the slots above the shaft and between theslides are filled up with suitable closing blocks 17. V P

Longitudinal slots 18 are formedin the plate 2 below the slides for the pawls to work in, and springs 19 are arranged under the pawls 14 for holding them in engagement with the teeth 11. The slides '5 can be slid downwardly by hand, and are prevented from sliding upwardly by the pawls 14. The rock-shaft 15 has a lever 20 at one end portion, and access to this lever is had through a hole or slot 21 in one end portion of the plate 2. When the lever 20 is depressed the pawls are released, and the slides 5 can he slid by hand in each direction. The slides 6 are provided with retaining pawls 24 which engage with their teeth 12. The pawls 24 project from a rock-shaft 25 which is mounted in a slot 26 in the plate 2. The slot 26 is similar to the slot 16 but it is broader than the slot 16 so that the rock-shaft 25 can slide laterally as well as rock in it, and it is provided with closing blocks 27 similar to the blocks 17. The pawls 24 work in longitudinal slots 28 in the plate 2, and they are pressed into engagement with the teeth 12 by springs 29 arranged under the pawls. The rockshaft 25 is pressed against the bottom side of the slot 26 by leaf springs 31. The rockshaft 25 has a lever 30 on one end which projects in the hole 21 and affords a means for disengaging the pawls 24 from the ratchet teeth 12. Looking plungers 35 are provided and are arranged to slide vertically in guide holes 36 in the plate 2. One end of each plunger bears on the rock-shaft 25 opposite one of its pawls, and its other end is engaged by a locking-cam 37. The locking-cams 37 are journaled in sockets 38 at thebottom edge of the plate 2, and they are provided with rectangular holes 39 for a locking-key.

The printing plate is placed between the opposed jaws of certain or all of the slides, according to its size, and the jaws are slid by hand into loose engagement with it. One or more of the locking-cams is then revolved by means of its key so as to move the rockshaft 25 laterally in its slot 26, and fgrce the jaw of the slide pertaining to it into clamping engagement with the prlnting plate. In this manner printing plates can be secured and released as often as, desired. and with very little trouble and'loss of time.

in Fig. 7 is provided with loose jaw plates 40. These jaw plates havedovetailed jaws 41 on one edge for engaging with a small printing plate, or a series of small printing plates, and they have wings42' for engaging with two of the jaws on the slides of the chase. These wings 42 have dovetailed jaws or edges as for hearing against the dovetailed jaws of the slides.

What I claim is: Y 1. In a chase, a supporting plate provided with an abutment for engaging with one edge of a printing plate, a slide carried by the supporting plate and provided with a jaw for engaging withthe opposite edge of the printing plate, a pivoted pawl and rack carried the supporting plate and slide rack and preventing the slide jaw from be ing moved away from the printing plate;

In a chase, a'suppoiting plate provided with parallel grooves, slides working in the said grooves and provided with toothed racks and having opposed jaws which project from the grooves and are adapted to enwitlr a printing plate, and disengageable pawls pivoted in the supporting plate and normally engaging with the 'said toothed racks;

4-. In a chase, a supportingplate provided with" parallel grooves, slides working 'in the said grooves and provided with toothed racks and having jaws which project from the grooves and are adapted to engagewith one edge of a printing plate, an abutment for the opposite edge of the printing plate, a rock-shaft journaled in the supporting Copies of this patent may be obtained for The face of the plate 2 is lined off with gage marks or parallel lines which divide its surface into ems. The plate shown plate and provided with pawls which normally engage with the toothed racks, and a lever on the rock-shaft for'disengaging the said pawls.

5. Ina chase, a supporting plate provided with parallel grooves, slides working in the said grooves and provided with toothed racksand having jaws which project from the grooves and are adapted to engage with one edge of a printingplajt'e, an abutment for theopposite edge of the printing plate, a l'aterally slidable rock -shaft mounted in the supporting plate and provided with pawls which normally engage with the toothed racks, springs which press the rockshaft laterally in one direction, locking devices for moving the rock-shaft laterally in the opposite direction, and means for turn ing the rock-shaft on its'axis to disengage the pawls from the toothed racks.

6. In a chase, a supporting j'late provided with parallel grooves, slides working in the said grooves and provided with toothed racks and having jaws which project from the grooves and are adapted: toengage with one edge of printing plate, an abutment for the opposite edge of the printing plate, a laterally slidable rock-shaft mounted in the supporting plate and provided 'with pawls which normally engage with the toothed'racks', springs which press the rockshaft laterally in onedirection, plungers slidable longitudinally in the supporting plate and bearing at one end against the rock-shaft, locking-cams ournaled in the supporting plate and bearing" against the other ends of the plungers and adapted to move them so as to press the rock-shaft latorally in-the reverse direction, and means for turning the rock-shafton its axis to disengage the pawls from the toothed racks.

7. In a chase, a supporting plate provided with parallel grooves, slides working inthe said grooves and provided with opposed jaws, a plate provided with wings which engage with the jaws on two similar slides and having a jaw arranged opposite the jaw of the slide" which intervenes between the two similar slides, said parts being adapted to engage witha printing plate, and means for securing the slides in-the grooves of 'the supporting plates.

In testimony whereof I have affixed my signature.

' rtuiunnien A. noenns;

five cents each by addressing the Commissionerofjtaten'qsi Washington, D. C31. 

